@bigcommerce/stencil-utils/src/tools/storage.js

Utility library used by BigCommerce Stencil Framework themes

export default class {
    /**
     * Check if a storage type (like localStorage or sessionStorage) is available for use
     * https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API#Testing_for_availability
     * @param type
     * @returns boolean
     */
    storageAvailable(type) {
        const storage = window[type];
        try {
            const x = '__storage_test__';
            storage.setItem(x, x);
            storage.removeItem(x);
            return true;
        } catch (e) {
            return e instanceof DOMException && (
                    // everything except Firefox
                e.code === 22 ||
                // Firefox
                e.code === 1014 ||
                // test name field too, because code might not be present
                // everything except Firefox
                e.name === 'QuotaExceededError' ||
                // Firefox
                e.name === 'NS_ERROR_DOM_QUOTA_REACHED') &&
                // acknowledge QuotaExceededError only if there's something already stored
                storage.length !== 0;
        }
    }

    localStorageAvailable() {
        return this.storageAvailable('localStorage');
    }
}